Hello, so i had a family party and my cousin was doing his physics homework so i decided to join in. now i'm at home and was playing with one of the problems that his teacher didn't assign and got an answer that i want to check because my teacher skipped the moment chapter(i go to community college and we ran out of time because we had a strike) so i really want to know if i got it.
i can't remember what exactly the question said but i remember my sketch
cart 1 and cart 2 are connected as a train going 4m/s
[m1]- *break* -[m2]-->7m/s
cart 1 cart 2
what is the velocity of cart 1
The Attempt at a Solution
P = mv
p=p' because of conservation of momentum?
p = m1v1 + m2v2
v1 = (p - m2v2)/m1
this is where i'm kind of iffy... if together they go 4m/s does that mean they both go 4m/s or is it divided by 2 each?